Shaft-coupling.



D. M. BLISS.

SHAFT COUPLING APPLIOATION FILED 33.29, 1908.

Patented Ju1 19, 19m.

were

-.DON*AL1D M. BLISS, OF NEW YORK, .N'. Y.

smear-consume.

Specification of Ltters'latent.

Patented duly 19, 1910.

Application filed February 29,v 1908. .Serial'lt'o. 418,605.

:ToaZZ whom it concern:

FBe it-knd nthat-I, DONALD M. Buss, a subject of the Kingof Great Britain, and a resident of New York city, county, and State, have invented certain new and-useful Improvements in Shaft-Couplings, of which thefollowing isa full, clear, and exact description, such as will enable others-skilled in the art to which it appertains to carry out the same.

:This invention-relates broadly to mechanioal connections, such as shaft couplings but more specifically, it concerns coupling de vices, certainparts of which may bereadily time be capable of being as readily coupled together. Soalso, these sections are so correlated and fashioned that they mayfirmly and truly inter-engage, thereby insuring a true running of the harder or other toolcarriedby the detachable section.

In general, this invention seeks to provide a device of the nature dislosed which, from a practical operative standpoint, will possess a high degree of eifectiveness and durability, and which, structurally considered, will be of the greatest ossible' simplicity, being composed of but ew parts all of which may be manufactured at a minimum of cost and which are so correlated as to be capable of being very readily assembled to accomplish the purposes intended.

Other objects and advantages will be in part obvious from the annexed drawings and in part pointed out in the following description.

In order that this invention may be the more fully disclosed and made comprehensible to others skilled in its relating arts, drawings illustrating one of the many ossible adaptations of the same are annexe as a part of this disclosure, t hough obviously verse section taken along the underlying features of this invention may be otherwise applied by modifications deduciblef-rom this lsclosure and therefore comprehended within-the intended scope of theclaims.

.In'the appended drawin s, corresponding parts are-slmilarly-referre to bylike charlongitudinal vertical section taken through the middle or center-line of the counter-part detachable section, showing .the disposition of the pin and-the form of the socket containing-the same. Fig. 3 is anend view of the sectionshown by Fig. 1, looking toward the bearing .face of the knurled collar and showing in dotted lines the eccentric dis positionof the groove and also the axially extending entry channel for the pin of the counter-part detachable section. Fig. 4 is an end view of the counterpart detachable section shown in sectional elevation by Fig. 2, and showing further details of the in mounting with the rear intermediate portion of the pin backed by the body portion of the section. Fig. 5 is a partial assembly view showing the main section A in elevation and turned through a quadrant from its position in Fig. 1, and showing in section the detachable counterpart section B partly telescoped over the main section, with the pin passing through the entry channel on its way to-the inter-looking groove. Fig. 6 is a transverse section taken along line 66 of .Fig. 5 and lookingto the left in the direction of thesmall arrows. Fig. 7 is a transversesection taken along line 7-4 of Fig. 5 lookin to the ri ht 1n the direction of the smal arrows. 1* ig. 8 is a complete assembly view of-the parts shown in Fig. 5 showing'the inter-locking position assumed when the two sections have been turned through a partial revolution relatively to one another. Fig. 9 is a transverse section taken along line 9-9 of Fig.8 and lookin toward the left in the direction of the smafi arrows, showing thezpin clam ed or wedged in the groove atone sideo the point of entry, and also showing the operative eccentricity of such groove. Fig. 10 is a transline 1010 oat-Fig. 8, looking toward the right in the direction of the small arrows, showing the pin wedged against the underlying portion of the groove and restrained against translation by the outer peripheral wall thereof.

Referring now to the accompanying drawings, it wil be seen that this invention comprises in general two detachable interchangeable sections or counter-parts A and B. hese two members are preferably so formed that they may closely interfit, in order that when connected or telescoped together they will be brought into a true alinement or exact relation with one another. That is to say, independently of the interlocking features, these two complementary sections may be readily telescoped together into a relatively precise fit. In this manner, a true rotation about a center-line or axis of the detachable section will be greatly promoted. Such section may of course either ermanently or temporari y carry a working implement such as a bufier, and in the former case an assortment of variously equipped detachable sections may be used in connection with each ower-driven section. To this end, section h provides an elongated cylindrical extension 1 which may be the end portion of a shaft and which may be snugly received by a complementary recess 2 in the com anion section B. As will be understood, the cylindrical extension 1 and its complementary recess 2 are provided with smooth contacting surfaces, thus enabling the detachable section B to slide or telesco e over its counter-part section A. This acilitates the act of connecting and disconnecting these two members. Section A. may also preferably provide a collar 3 rigidly secured to the shaft and against which the.

extreme end a of the counter-part section B may find an abutment, as shown more clearly by Fig. 8. It will be perceived that this also is a -eature of advanta e for, when these parts are pressed tight y together by the inter-locking features, t e tendency is to eliminate any back-lash or like looseness and bring the parts into a more perfect alinement. It may here M observed that the collar 3, when mounted on the driving shaft, may have its outer circumference knurled and may be of suflicient diameter to enable it to be grasped bythe hand after'the power is turned ofi', thus enabling the driving shaft to be quickly brought to a stop. in like manner, the outer eri hery of the detachable section B may fiso fie knurled to enable it to be turned into inter-locking relation with the counterpart section it. So also, section B may be of a somewhat less size than the collar 3 of section A, as shown by the drawings. lBy havin both the collar and counterpart section inurled, the separation of the two is greatly expedited and made more convenient.

That portion of my invention which more particularly constitutes the means instrunearer mental in inter-locking or clamping together the two above described sections may now be set forth. lln the preferred form, the section A is provided with a cylindrical enlargement or hub 5 extending from the abutment face or end of the collar toward the end of the shaft or extension 1, and in like manner, the abutting end 4 of the counter-part section B is centrally provided with a complementary cylindrical enlarged bore 6 adapted to snugly receive the aforesaid hub 5. One or the other of these last mentioned features will be provided with a projection or stud which may be brought into inter-locking engagement with a corresponding seat or recess, such as a groove extending peripherally in opposite directions from an entry channel provided by the other. For example, as shown by the draw ings, it may be the hub 5 which. is provided with the seat for receiving the projection, and such projection may conveniently tend from the inner circumferential surface of the enlarged bore 6. Obviously, the loca tion of these features may be reversed. A. suitable projection or stud may be very sad vantageously formed by tangentially boring a hole through the section B so as to continuously intersect for a short distance the inner circumferential surface of the en larged bore (3. That is to say, such hole may be bored so as to form a chord with respect to the outer eriphery of the counterpart section B an a partially intersected tangent with res ect to the inner periphery of the enlarged ore 6. llnto this hole will then be tightly driven a straight in 7 made of hard wear-resisting materia such. as steel, and the protruding ends may be ground or filediod so as to come flush with the exterior circumference of the section B and thus be not noticeable. This pin will be rigidly and immovably carried by the section B. This will constitute an inexpensive and yet highly satisfactory mode of forming the projection 7, it bein apparent that the intermediate semi-cylin r tion of the pin which protrudes from the interior circumference of the enlarged bore will act as the projecting feature of the Y interlocking means. it may here be recalled that such feature will at times be exposed to very considerable strains when wedged in place and accordingly should be mounted as firmly as possible so as not to work loose.

This desideratum is very completely attained by my construction for the pin is not only supported at its ends in the material of the section in which they are enbedded,

but its intermediate or strain receiving portion finds an ample backing also against such action. Furthermore, since only a semi-cylindrical intermediate portion protrudes, the remaining semi-cylindrical portion is held or countersunk, so to speak, in

lltl

ical por- I the; iiinerj-periphery of I: l e section. 'As a I i-esulgjthe interinediate'rportion ofthe pin is;".baclted'agamst a lateral or transverse no einent, thus preventing thepin from bending under,the most severe strains of the --wedg1ng of the two sections to ether; This feature of my invention is'o? great commercial advantage and goesfar to make the device durable and serviceable."

Asa seat for receiving and retaining the stud or pin 7, I preferably utilize the shown peculiar groove 8 which is formed in the outer periphery of the enlarged hub 5. It

will be apparent, however, that such groove 8 may be varied smnewhat in form and disposition within the terms of this invention. In this illustrative embodiment, such groove 8, so to speak, bears an eccentric relation to the hub That is to say, groove 8 near the point of admission of the pin 7 has its maxinnnn depth, and at a remote and usually diametrically opposite point, it has itsminimum depth. In other words, the groove 8 may pro ressively diminish in depth, and also in width, the pin 7 to a diametrically opposite point. It is to be noted, that in the more intense aspect of'this invention, this groove peripherally extends in both directions from the point of entry of the pin 7. This peculiarity of the pin 7 and, as a matter offact, the pin may, so far as its rojecting or exposed portion is concerned, e regarded as corresponding to the segmental or other shaped piece which has been removed from the outer wall of groove 8. Evidently such pin groove and passage-way may be variously contoured. It should here be mentioned that the outer most side wall of the groove 8 forms a pcripherally extending shoulder 10 which when disposed on the hub 5 referably inclines toward or approaches t e collar 3 of section A in o posite directions, beginning at the point 0 entrance for the pin 7. In this illustrative embodiment of my invention, such inclination or approach occurs on both sides of the aforesaid )oint of entry of the pin 7. The purpose oi this inclination is to wedge the pin and its associated section toward the said collar when the two sections A and B are turned relatively to one another in either direction. This operation consequently brings the end face 4 of section B member and a groove (providin from the point of entrance of &

tightly against the corresponding portion of the collar 3 of the other section A. At the same time, owing to the rogressive decrease -in depth and width of t e groove 8, the under-portion of such pin will be wedged againsta corresponding underlying portion o such groove, thereby further wedging or clamping the parts firmly together as is desired. 1

As casting light on the manner in which I wish to be understood, I desire to note that I have herein referred to a pin protruding from the inner circumference of one ment wall) in the outer circumference of the complementary member, these relations may be interchanged or reversed and, therefore, when I have merely used the term circumference or periphery in my appended claims, it is to be regarded as descriptive of either the inner or the outer circumference or otherwise, as the case may be.

It will thus be perceived that I have succeeded in devising a clutch well adapted to achieve the various objects and ends in view, and that my invention is notable for a characteristic simplicity arising from the few parts of which it is composed. Furthermore, these parts are none of an involved individual design, but on the contrary, are of such nature as enables them to be made with the greatest of facility by the various appliances found in all well equipped machine shops. Thus the groove 8 may be readily turned in the hub or other part by merely mounting the latter in a lathe so as to rotate about an ofi'-center axis. From the aspect of its use and operation the sections may be very easily separated and attached by first telescoping the one over the other, and then by giving the free section a slight twist or turn, say to the extent of a quadrant. It will then be found that the two sections will readily interlock and become clamped toether, thus not only preventing accidental oosening, but also insurin a perfect alinement and true running 0 the parts. The clutch is equally adapted to run in either direetion and is consequently serviceable in man arts, especially for manufacturing jewe ers and polishers. The latter freuently emplo an electric motor in which t e armature shaft protrudes from opposite sides of the motor. By virtue of my inven-- an abuta projection within said enlarged bore.

closure. to be r rded in an illustrative, rather than in a imiting sense, and Ialso desire it to be understood that the language prior art, might be said to fal there be-- tween.

Having thus described my invention, I claim as new and desire to secure by Letters Patent: a

1. A device of the nature disclosed comrising in combination, a pair of detachable mterfitting members, the one comprising a shaft, a hub mounted on said shaft at a distance from the end thereof, an enlarged collar arranged at the rear end of said hub and providing an end bearing face, said hub havmg an entry, a groove clrcumferentially extending from said entry and arranged to progressively decrease in capacityfrom said entry, the counterpart member having an elongated socket for said shaft. beyond said hub and havin an enlarged bore for snugly receiving said ub, said member also having 2. A device of the nature disclosed prising in combination, a pair of detachable lnterfitting sections, the one comprising a shaft, an enlarged collar fixed to said shaft at a distance from the end thereof and 'pro-.

viding an annular abutment end-face, a hubshaped member extending from said collar toward the end of said shaft, the counterpart section having a socket-like member adapted to snugly receive said hub-shaped member and having an annular end adapted to aliut said collar, said section having an elon ated bore for receiving the protruding end 0 said shaft, one of said members having a periphery provided'with an axially extending entry channel and; a wedging groove circling in opposite directions from said entry channel, and a pin projecting from a contacting Egriphery of said other member adapted to arranged to progressively decrease in caacity from said entry, the counterpart member having an elongated socket for the portion of said shaft extending beyond said .hub and havin an enlarged bore for snugly receiving said ub,said counterpart member also havmg'an aperture extending in the direction ofa chord and having an intermediate intersection with the inner circumference of said enlarged bore, and a straight pin tightly fitted within. said aperture, whereby an intermediate portion will pro ject from the inner circum erence of said enlarged bore and be partially embedded in and supported at its rear by the annular wall thereof.

DONALD M. BLISS.

Witnesses:

WILFRID M; HENNESSY, A. A. Woons. 

